Results & measures · Presidential election results
Vote share
A party's percentage of all votes cast, including third-party and write-in votes.
Vote share is a party's votes divided by every vote counted in that geography — Democratic, Republican, and all others. The Democratic, Republican, and 'other' shares sum to 100%.
Because the denominator includes minor-party and write-in votes, a candidate can carry a place with less than 50% of the vote (a plurality) — Bill Clinton won the 1992 presidency with 43% of the national vote. This is also why pumsdata's signed margin is computed over all votes rather than just the two major parties.
Also known as: percent of the vote, share of the vote.
Data: MIT Election Data & Science Lab, Harvard Dataverse.
See vote share on the map
Explore presidential election results by state (1976–2024) and county (2000–2024) — margins, swings, and vote shares, election by election. Free while we're in beta.
Vote share — FAQ
What is vote share in election results data?+
A party's percentage of all votes cast, including third-party and write-in votes. Vote share is a party's votes divided by every vote counted in that geography — Democratic, Republican, and all others. The Democratic, Republican, and 'other' shares sum to 100%.
Why does vote share matter?+
Because the denominator includes minor-party and write-in votes, a candidate can carry a place with less than 50% of the vote (a plurality) — Bill Clinton won the 1992 presidency with 43% of the national vote. This is also why pumsdata's signed margin is computed over all votes rather than just the two major parties.
Where does this election data come from?+
All figures come from the MIT Election Data and Science Lab (MEDSL), published on the Harvard Dataverse — state-level presidential returns 1976–2024 and county-level returns 2000–2024. pumsdata is an independent product that makes the data easy to map and compare, and is not affiliated with MEDSL or Harvard.